lp855x.h

Go to the documentation of this file.

/*
 * LP855x Backlight Driver
 *
 *          Copyright (C) 2011 Texas Instruments
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#ifndef _LP855X_H
#define _LP855X_H

#define BL_CTL_SHFT (0)
#define BRT_MODE_SHFT   (1)
#define BRT_MODE_MASK   (0x06)

/* Enable backlight. Only valid when BRT_MODE=10(I2C only) */
#define ENABLE_BL   (1)
#define DISABLE_BL  (0)

#define I2C_CONFIG(id)  id ## _I2C_CONFIG
#define PWM_CONFIG(id)  id ## _PWM_CONFIG

/* DEVICE CONTROL register - LP8550 */
#define LP8550_PWM_CONFIG   (LP8550_PWM_ONLY << BRT_MODE_SHFT)
#define LP8550_I2C_CONFIG   ((ENABLE_BL << BL_CTL_SHFT) | \
                (LP8550_I2C_ONLY << BRT_MODE_SHFT))

/* DEVICE CONTROL register - LP8551 */
#define LP8551_PWM_CONFIG   LP8550_PWM_CONFIG
#define LP8551_I2C_CONFIG   LP8550_I2C_CONFIG

/* DEVICE CONTROL register - LP8552 */
#define LP8552_PWM_CONFIG   LP8550_PWM_CONFIG
#define LP8552_I2C_CONFIG   LP8550_I2C_CONFIG

/* DEVICE CONTROL register - LP8553 */
#define LP8553_PWM_CONFIG   LP8550_PWM_CONFIG
#define LP8553_I2C_CONFIG   LP8550_I2C_CONFIG

/* DEVICE CONTROL register - LP8556 */
#define LP8556_PWM_CONFIG   (LP8556_PWM_ONLY << BRT_MODE_SHFT)
#define LP8556_COMB1_CONFIG (LP8556_COMBINED1 << BRT_MODE_SHFT)
#define LP8556_I2C_CONFIG   ((ENABLE_BL << BL_CTL_SHFT) | \
                (LP8556_I2C_ONLY << BRT_MODE_SHFT))
#define LP8556_COMB2_CONFIG (LP8556_COMBINED2 << BRT_MODE_SHFT)
#define LP8556_FAST_CONFIG  BIT(7) /* use it if EPROMs should be maintained
                      when exiting the low power mode */

enum lp855x_chip_id {
    LP8550,
    LP8551,
    LP8552,
    LP8553,
    LP8556,
};

enum lp855x_brightness_ctrl_mode {
    PWM_BASED = 1,
    REGISTER_BASED,
};

enum lp8550_brighntess_source {
    LP8550_PWM_ONLY,
    LP8550_I2C_ONLY = 2,
};

enum lp8551_brighntess_source {
    LP8551_PWM_ONLY = LP8550_PWM_ONLY,
    LP8551_I2C_ONLY = LP8550_I2C_ONLY,
};

enum lp8552_brighntess_source {
    LP8552_PWM_ONLY = LP8550_PWM_ONLY,
    LP8552_I2C_ONLY = LP8550_I2C_ONLY,
};

enum lp8553_brighntess_source {
    LP8553_PWM_ONLY = LP8550_PWM_ONLY,
    LP8553_I2C_ONLY = LP8550_I2C_ONLY,
};

enum lp8556_brightness_source {
    LP8556_PWM_ONLY,
    LP8556_COMBINED1,   /* pwm + i2c before the shaper block */
    LP8556_I2C_ONLY,
    LP8556_COMBINED2,   /* pwm + i2c after the shaper block */
};

struct lp855x_pwm_data {
    void (*pwm_set_intensity) (int brightness, int max_brightness);
    int (*pwm_get_intensity) (int max_brightness);
};

struct lp855x_rom_data {
    u8 addr;
    u8 val;
};

struct lp855x_platform_data {
    char *name;
    enum lp855x_brightness_ctrl_mode mode;
    u8 device_control;
    int initial_brightness;
    struct lp855x_pwm_data pwm_data;
    u8 load_new_rom_data;
    int size_program;
    struct lp855x_rom_data *rom_data;
};

#endif